Export audio file from video file - only two minutes of coding

This is a dead easy new feature! When creating an export of a video, provide the option to create an audio file (as well as or instead of an mp4).

This program actually does this now. The export to mp4 creates an .aac audio file and an .m4v video file, and merges them at the end to create an mp4. So all I want you to do is not delete the .aac file.

I found I can import the audio into ProShow Producer, which is much easier and more efficient than importing the whole video.